Answer: With algebraic expressions, you can’t add and subtract any terms like you can add and subtract numbers. Terms must be like terms in order to combine them. So, you can’t always simplify an algebraic expression by following the order of operations. You have to use the distributive property to rewrite the expression and then combine like terms to simplify. With numeric expressions, you can either simplify inside the parentheses first or use the distributive property first.
Step-by-step explanation: Sample Response
Here’s the answer to your question. option C Is correct
0 means u do not move right or left at all and the 4 means u move up 4 units.
Answer:
See below for answers and explanations
Step-by-step explanation:
<u>Part A</u>
Assuming that conditions have been met for the interval, we use the formula
where
represents the sample mean,
represents the critical value,
represents the sample standard deviation, and
is the sample size.
The critical value of
for an 80% confidence level with degrees of freedom
is equivalent to 
Thus, we can compute the confidence interval:

Therefore, we are 80% confident that the true mean age of all customers is between 30.17 and 35.11 years.
<u>Part B</u>
The margin of error is 
Answer:
Step-by-step explanation:
You can answer this using the law of cosines:

c^2 is equal to 4^2 + 7^2 - 2(4)(7)(cos 102º)
= 16 + 49 - 56(cos 102º)
c^2 ~ 76.64 --> c ~ 8.8